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authordrebs <drebs@leap.se>2013-10-24 16:26:40 -0200
committerdrebs <drebs@leap.se>2013-10-24 17:57:51 -0200
commitc5b8e13c6c016a880f88e95d3f084c12b94029c5 (patch)
treef2b916a88f1f3d3184b1bf916883d0fbb7f61e98 /src/leap/mail/smtp
parentd646db5fc8b6f79a66bc96280f59bc90afec4e8b (diff)
Implement TLS wrapper mode.
Diffstat (limited to 'src/leap/mail/smtp')
-rw-r--r--src/leap/mail/smtp/smtprelay.py31
-rw-r--r--src/leap/mail/smtp/tests/__init__.py4
-rw-r--r--src/leap/mail/smtp/tests/cert/server.crt29
-rw-r--r--src/leap/mail/smtp/tests/cert/server.key51
4 files changed, 105 insertions, 10 deletions
diff --git a/src/leap/mail/smtp/smtprelay.py b/src/leap/mail/smtp/smtprelay.py
index d9bbbf9..fca66c0 100644
--- a/src/leap/mail/smtp/smtprelay.py
+++ b/src/leap/mail/smtp/smtprelay.py
@@ -17,6 +17,20 @@
"""
LEAP SMTP encrypted relay.
+
+The following classes comprise the SMTP relay service:
+
+ * SMTPFactory - A twisted.internet.protocol.ServerFactory that provides
+ the SMTPDelivery protocol.
+ * SMTPDelivery - A twisted.mail.smtp.IMessageDelivery implementation. It
+ knows how to validate sender and receiver of messages and it generates
+ an EncryptedMessage for each recipient.
+ * SSLContextFactory - Contains the relevant ssl information for the
+ connection.
+ * EncryptedMessage - An implementation of twisted.mail.smtp.IMessage that
+ knows how to encrypt/sign itself before sending.
+
+
"""
import re
@@ -173,7 +187,6 @@ class SMTPFactory(ServerFactory):
@return: The protocol.
@rtype: SMTPDelivery
"""
- # If needed, we might use ESMTPDelivery here instead.
smtpProtocol = smtp.SMTP(SMTPDelivery(self._km, self._config))
smtpProtocol.factory = self
return smtpProtocol
@@ -305,7 +318,7 @@ class SMTPDelivery(object):
# EncryptedMessage
#
-class CtxFactory(ssl.ClientContextFactory):
+class SSLContextFactory(ssl.ClientContextFactory):
def __init__(self, cert, key):
self.cert = cert
self.key = key
@@ -450,6 +463,8 @@ class EncryptedMessage(object):
self._config[PORT_KEY]))
d = defer.Deferred()
+ # we don't pass an ssl context factory to the ESMTPSenderFactory
+ # because ssl will be handled by reactor.connectSSL() below.
factory = smtp.ESMTPSenderFactory(
"", # username is blank because server does not use auth.
"", # password is blank because server does not use auth.
@@ -457,15 +472,15 @@ class EncryptedMessage(object):
self._user.dest.addrstr,
StringIO(msg),
d,
- contextFactory=CtxFactory(self._config[CERT_KEY],
- self._config[KEY_KEY]),
- requireAuthentication=False)
+ requireAuthentication=False,
+ requireTransportSecurity=True)
signal(proto.SMTP_SEND_MESSAGE_START, self._user.dest.addrstr)
- reactor.connectTCP(
+ reactor.connectSSL(
self._config[HOST_KEY],
self._config[PORT_KEY],
- factory
- )
+ factory,
+ contextFactory=SSLContextFactory(self._config[CERT_KEY],
+ self._config[KEY_KEY]))
d.addCallback(self.sendSuccess)
d.addErrback(self.sendError)
return d
diff --git a/src/leap/mail/smtp/tests/__init__.py b/src/leap/mail/smtp/tests/__init__.py
index 7fed7da..9b54de3 100644
--- a/src/leap/mail/smtp/tests/__init__.py
+++ b/src/leap/mail/smtp/tests/__init__.py
@@ -113,8 +113,8 @@ class TestCaseWithKeyManager(BaseLeapTest):
'username': address,
'password': '<password>',
'encrypted_only': True,
- 'cert': 'blah',
- 'key': 'bleh',
+ 'cert': 'src/leap/mail/smtp/tests/cert/server.crt',
+ 'key': 'src/leap/mail/smtp/tests/cert/server.key',
}
class Response(object):
diff --git a/src/leap/mail/smtp/tests/cert/server.crt b/src/leap/mail/smtp/tests/cert/server.crt
new file mode 100644
index 0000000..a27391c
--- /dev/null
+++ b/src/leap/mail/smtp/tests/cert/server.crt
@@ -0,0 +1,29 @@
+-----BEGIN CERTIFICATE-----
+MIIFBjCCAu4CCQCWn3oMoQrDJTANBgkqhkiG9w0BAQUFADBFMQswCQYDVQQGEwJV
+UzETMBEGA1UECAwKU29tZS1TdGF0ZTEhMB8GA1UECgwYSW50ZXJuZXQgV2lkZ2l0
+cyBQdHkgTHRkMB4XDTEzMTAyMzE0NDUwNFoXDTE2MDcxOTE0NDUwNFowRTELMAkG
+A1UEBhMCVVMxEzARBgNVBAgMClNvbWUtU3RhdGUxITAfBgNVBAoMGEludGVybmV0
+IFdpZGdpdHMgUHR5IEx0ZDCCAiIwDQYJKoZIhvcNAQEBBQADggIPADCCAgoCggIB
+APexTvEvG7cSmZdAERHt9TB11cSor54Y/F7NmYMdSOJNi4Y0kwkSslpdfipi+mt/
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+VQ5V15TwLsTzOFGG8Cgp68TR8zHuZ4Edf2zMGC1IaiJ6W38LTnJgsowYOCFDAF3z
+L36kxMO5gNGEUYV6tjltx+rAcXka3po+xiAgvW6q65UUgDHcIdEGG2dc9bkxxPl7
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+Kb1h948gUT9/oswXG+q2Kwk8AoggMJkUOWDFiCa5UjW1GBoxxb7VtZ+QTJXxlFWc
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+VLhbxZlBYcLxCqqNsGJrWaiHj2Jf4GhUB0O9hXfaZDMqEGXT9GzOz0yF6b3pDQVy
+H0lKIBb+kQzB/jhZKu4vrTAowXtt/av5d7D+rpAU1SxfUhBOPNSRoJUI5NSBbokp
+a7u4azdB2IQETX3d2rhDk09EbG1XmMi5Vg1oa8nxfMOWXZnDMusJoZClKjrthmwd
+rtR5et44XYhX6p217RBkYMDOVFT7aZpu4SaFeqZIuarVYodSmgXToOFXPsrLppRQ
+adOT0FpU64RPNrQz5NF1bSIjqrHSaRVacf8yr7qqxNnpMsrtkDJzsMBz
+-----END CERTIFICATE-----
diff --git a/src/leap/mail/smtp/tests/cert/server.key b/src/leap/mail/smtp/tests/cert/server.key
new file mode 100644
index 0000000..197a449
--- /dev/null
+++ b/src/leap/mail/smtp/tests/cert/server.key
@@ -0,0 +1,51 @@
+-----BEGIN RSA PRIVATE KEY-----
+MIIJKQIBAAKCAgEA97FO8S8btxKZl0AREe31MHXVxKivnhj8Xs2Zgx1I4k2LhjST
+CRKyWl1+KmL6a380WD+4YqLWZyC+5d1VtU9n2sKBWkjMydw7xEA/trn4jbMpTOow
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+s+AgrZ4qYmskrFaD0PHakWsQNHGC8yOh80lgE3Gl4nxSGAvkcR7dkSmsIQFL
+-----END RSA PRIVATE KEY-----